通过黑洞附近量子场的通信
Communication through quantum fields near a black hole
摘要：
研究了3+1维Schwarzschild时空中两个局域一次量子化系统之间通过量子场进行通信的量子信道。我们分析了直接和黑洞轨道零测地线的信息承载能力，以及由于强惠更斯原理在史瓦西背景下不成立而产生的类时贡献。我们发现，特别是，非直接零和类时的贡献，不拥有一个类似的闵可夫斯基时空，可以支配的直接零的贡献。我们涵盖的情况下，测地线和加速发射器。从技术上讲，我们将以前设计的用于研究弯曲时空中波传播的工具应用于相对论性量子信息通信设置，首先是一般时空，然后是史瓦西时空。
英文摘要：
We study the quantum channel between two localized first-quantized systems that communicate in 3+1 dimensional Schwarzschild spacetime via a quantum field. We analyze the information carrying capacity of direct and black hole-orbiting null geodesics as well as of the timelike contributions that arise because the strong Huygens principle does not hold on the Schwarzschild background. We find, in particular, that the non-direct-null and timelike contributions, which do not possess an analog on Minkowski spacetime, can dominate over the direct null contributions. We cover the cases of both geodesic and accelerated emitters. Technically, we apply tools previously designed for the study of wave propagation in curved spacetimes to a relativistic quantum information communication setup, first for generic spacetimes, and then for the case of Schwarzschild spacetime in particular.
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